Milling machine transmission and control mechanism



March 18, 1941. E ROEHM ET-AL 2,235,085

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed NOV. 15, 19159 5 Sheets-Sheet 2 UM JMI'LWML .IJ1LLLIMLL MLLIMMH ATTORNEY.

March 1941- E. e. ROEHM ETAL MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Nov. 15, 1959 5 Sheets-Sheet 3 7, 5 24 297 6 m/ a'o w v/ m mmmwhm j i I I UM 44m rl1\ w 10 2 h w B4 5 a P 4 .w 7 27 u a w E M /k a m m, v as 7 1 Z I 0% W] 0 w M B I y n 7 Z w i I f "M w V March 18, ROEHM ETAL MILLING ILA CHINE TRANSMISSION AND CONTROL MECHANISM Filed Nov. 15, 1939 5 Sheets-Sheet 4 Jlz'a 6 5 1/ March 1941- E. G. ROEHM ETAL MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Nov. 15, 1939 5 Sheets-Sheet 5 20. The remaining port will, of course, be connected to one of the reservoir ports 30-". A spring 44 is introduced between the end of the servo-valve plunger 32 and the valve housing, thereby creating a constant use in one direction which serves to remove any backlash between the screw 39 and the nut 38. When the piston 20 moves it causes the screw "to exert an axial thrust on the nut 38 in a direction opposite to its initial movement, thereby closing the pressure port 29 of the servo-valve.

A power operated transmission is provided for efl'ecting actuation of the servo-motor at a plurality of feed rates or at a rapid traverse rate as well as in opposite directions, and an improved control mechanism is provided for governing the transmission whereby diiferent automatic operating cycles may be obtained.

The transmission is mounted in agear box 45 located in the bed of the machine as shown in Figure l and is driven by a prime mover, such as an electric motor 46 illustrated in Figure 13. The transmission has a primary drive shaft er which is connected by a train of gears, indicated generally by the reference numeral 58, to the armature shaft 49 of the motor 56. The shaft at has a rapid traverse drive gear 5!! keyed thereto which is operatively connected through the train of gears 5| and 52 to the final gear 53 of the rapid traverse branch. The shaft 4! also drives through a variable speed friction device, indicated generally by the reference numeral 54, a gear 55 at variable feed rates.

The variable speed friction device may be the same as that shown in U. 8. Patent 1,950,675, and therefore further description thereof is not believed to be necessary.

Attention is invited to the fact that the gears 52 and 55 are provided with integral beveled gears 58 and 51 and these gears are continuously rotated in opposite directions because the idler 5| causes the gear 52 to rotate in the same direction as the gear 50, while the output gear 68 of the variable speed friction device is rotated in the same direction as the shaft 41 by the circumscrib ing ring 58 of the variable speed friction device, thus causing the gear 55 to rotate in a direction opposite to the shaft 41. A differential bevel gear intermeshes with gears 56 and 51 and is rotatably supported on a cross pin 6! fixed in a bracket 62 which is integral with shaft 63. The shaft 88 serves to support the gears 56 and 51 for free rotation, but is integrally connected to a spur gear 54.

It will now be apparent that if the gears 52 and 55 are rotated at the same rate but in opposite directions that the bevel gear 58 will rotate about its axis at the same speed as gears 56 and 5i and not cause any rotation of shaft 63 and spur gear 64. If, with this condition prevailing, the rate of rotation of gear 55 is decreased as,.for instance, by two revolutions per minute, the differential action will cause the gear 64 to rotate at one revolution per minute. Thus, by gradually decreasing the rate of rotation of the gear I55, as by means of the variable speed friction device. the rate of rotation of the gear 84 may be increased. By means of this combination very low feed rates may be obtained.

The gear 84 drives a gear 65 which is supported in co-axial relation with the rapid traverse gear 53 for alternate connection to output shaft 66.

gagement of the feed clutch 00 whereby the shaft 66 will be driven by the gear 68; and in the opposite direction to effect engagement of the friction clutch 10 whereby the rapid traverse gear 58 will drive the shaft 68.

The gear 81 is operatively connected through an intermediate idler H to one of two reversing gears 12 supported on shaft II. The gear ll meshes directly with the other reversing gear 14 supported on shaft 18 whereby the gear (I will be rotated oppositely to gear 12.

The opposing faces of gears 12 and 14 have clutch teeth I! and 1' respectively for interengagement with clutch teeth formed on opposite ends of the shiftable reversing clutch TI. The clutch I1 is splined on the shaft 13 whereby upon engagement of the clutch with either-gear 12 or 74 the shaft II will rotate shaft l! and sprocket wheel 80 through a pair of bevel gears indicated generally by the reference numeral '18. This sprocket wheel is connected by a chain ill to sprocket wheel 52.

The gear {it constitutes a feed-rapid traverse selector, or in other words, a rate selector and is operatlvely connected by a cross pin 82 to a piston 88 which is slidably mounted in an axial bore QQ formed in the shaft 56. The pin 82 passes through elongated slots at in the shaft in order to permit sumcient lateral movement of the pin 82 to effect engagement of the clutches 89 and ll. A spring 88 is interposed between one end of the piston 83 and the end of the bore 84 to normally urge the selector 68 in a direction to cause engagement of the feed clutch 89. The other end of the bore 84 is closed and provided with a port 81 to which is connected a fluid supply channel It. When pressure is delivered through this channel the piston 88 is moved against the compression of spring 86 to cause engagement of the rapid traverse clutch Ill.

The clutch l1 constitutes a direction selector which also has a centralized stop position. The clutch is shifted by a shifter fork 89 and piston l0 into engagement with the clutch 16; by piston 8| into engagement with the gear I5; and into a central position by a pair of sleeves 82 and 93. The sleeves 82 and 93 are slidably mounted in cylinders 94 and 95 and are provided with shoulders 88 which limit the outward movement of the sleeves under pressure. The projecting ends of the sleeves are of such length that when pressure is admitted to both cylinders the sleeves will centralize the clutch ll as the shoulders engage the ends of the cylinders. The parts are shown in this position in Figure 13. With the parts thus positioned, if pressure is admitted to only one cylinder, then one of the central pistons Gil-9| will shift the fork t9 and simultaneously cause retraction of the opposing piston and surrounding sleeve. Thus, the clutch ll may be shifted to any one of three positions.

Means have been provided for manual actuation of the shaft 13, when the reversing clutch is in a neutral position, comprising a hand wheel 96 supported for free rotation on the shaft 13. A shlftable clutch member 91 is splined on the wait 13 for operatively connecting the hand wheel 96 to the shaft 13. The clutch 9'! is shifted by a shifter fork 98 that is normal y held in a disengaged position by a spring 99. A fluid operable piston wt, slidably mounted in a cylinder It, is adapted to be hydraulically actuated for shifting the clutch into engagement with the hand wheel.

The reversing cylinders 9 3 and 95 are 0peratively connected by channels W2 and W3 to aesaoss ports ill and I" of a rate and direction control valve, indicated generally by the reference numeral I. This valve has a housing Ill in which the ports I and Ill are formed. The 5 valve also has a port I" which is connected by channel Ill! to the pressure supp y port III of a rapid traverse pump control valve Ill. The valve also has a port H2 to which the reed supply pump H3 is connected by channel H4. The 10 feed pump has an intake ill through which fluid is withdrawn from a reservoir l N. i

An annular groove Ill formed in the periphery of a sleeve H8 serves to continuously interconnect port H! with port Ill whereby the delivery in from the teed pump flows continuously through the valve ill. Thus, the port I" o! the control valve I! is continuously supplied with fluid.

The control valve III has a rotatable sleeve Ill which is fixed against axial movement. The W cloevehas an annular groove III formed in its periphery which interconnects the pressure port it with an interdrliled passage ill formed in the housing iii, Figures 1 and 13, and this naename has an outlet 122 which is in constant com iuuuication with an annular groove in formed in the periphery of the sleeve lit. As shown in Figure 6, the groove I23 has a series of longitudinaliy extending grooves I which are of suiucicnt length to overlap in a cross sectional plane m, at shown in Figure 12 with the ends oi a second series of longitudinal grooves it! which intercommunicate with an annular groove I28. The ports I04 and ill lie in this cross sectional plane and the parts are so related that in one rotatable on position of the sleeve the port ll! is connected by groove lit to pressure groove I28, while the port Hi l is connected by groove it! to the exhaust uroove H6.

when the sleeve is rotated through an angle M represented by the space between a groove I and a groove HI, the hydraulic connectionstc cylinders 84 and I are reversed. The sleeve is hydraulically oscillated from one position to the other by a pair of pistons I21 and l1I,Figure 10, which are located on opposite sides 0! a lever ill having a pivot I" at one end and a connection I at the other end to the sleeve.

Pistons I21 and I28 are slidabiy mounted in cylinders l3! and I". The cylinder 13! is conmated by a channel I to port ill 0! a pilot valve I36; The cylinder I3! is connected by .a channel I31 to port in of a second pilot valve i". The pilot valves I36 and II! have pressure ports lit and MI respectively which are operatively connected by branch channels I and I to the pump supply line NB. The pilot valves I and lit have valve plungers which are of the push button type in the sense that the plungers are adapted to be depressed by trip dogs carried by m the movable support such as the table but as soon as the dog has passed out of engagement with the plunger the same is returned to its normal position by a spring. These valves have plungers ll! which are 0! the same construction and each has co. an annular groove I tor interconnecting the pressure port with the cylinder part, upon depression of the plunger, to cause rotation of the sleeve in opposite directions. v

Each plunger also has a shoulder Ml! which to limits its outward movement by the spring I" which is interposed between the end oi the plunger and the end of the housing. The open cting ends of these plungerc are cut away to iorln doc contacting suriacec Md and Mt. "llhece iii portionc are illustrated in euros 3 and t and till are adapted to be actuated-by reversing dogs, one oi which is illustrated at Ill. h

After the control valve sleeve has been shiited it is desirable that the pressure in the actuating channel. such as or 31. be reduced so that I. subsequent actuation in the opposite direction can be effected. Since no reservoir connection is provided for in the valving. the chan els I" and II! have been provided with bleeder coils Ill and III whereby alter the trip plungere ill have been to spring returned to their normal position. the actuating fluid will immediately bleed iufllciently to cause the pressure to drop to atmospheric pressure and thus facilitate, the next shifting movement. The control valve has a central plunger I II which is axially movable in the bore of the sleeve H9 and this plunger has three positions, a top position, in which it is shown in Figuree 'l and 13, being the "stop" position; an intermediate or no food position; and a lower or rapid traveroe positicn'. The plunger been wide annular groove itli in which in drilled a or here let to eiiect com muui'cation with an cl bore ill which to open at the lower end to tortilla reservoir connection. w The plunger has a eecond annular i H Hi8 which in. the atol Petition eatablisheu communication through-radial holes in in the bottom oi groove In between the ercmire port in and the annular groove I". since the groove i2! is a go continuouspresaure ve, and the groove I2! I being also comma to pressure at this time. both channels it:- and lll'are under pressure,

I thereby actuating sleeves l2 and I! to p sition the reversing clutch in its stop position.

The Plunder ill is manually shifted by a lever I which is rotatabiv supported by a pin ill on a pair of ears in internal with a cap member in. The can is secured to the upper end of the sleeve ill by fllilster headed screws I. The a sleeve is provlded'with an annular rib ill to form a pair oi! shoulders, the lower'shoulder resting on the housing ill and the upper shoulder'being enneed by a clamping plate I" which is secured to the housing by screws III, which thusholds. a g the sleeve against axial movement while permitting rotation thereof. It will thus be seen that. rotation of the handle I will rotate the sleeve I while movement or the handle about the axis of pin m will eilectaxial movement of the plunger M I" through a cross pin lil' carried by the lever. ll! and engaging a slot Ill in plunger m. A detent mechanism is provided .ior holding the plunger in either one of three positions and comprises a detent plate l" which is secured to the pin ill by a set screw I. A detent plunger lid is pivoted to the lover I on a pin I'll, and a spring "2 serves to maintain the detent lever into engagement with the periphery of the detent plate. The plate is provided with three V-uotches m, m and m which correspond to m the three positions oi the plunger II.

when the plunger Ill moves downward to its intermediate position. at which time the detent lever ill will engage notch ill, the annular groove in will establish communication between the groove ll. in the sleeve and the exhaust port ill in the plunger. This will cause the reversingclutch to be shifted in a direction corresponding to the rotatable position oi the sleeve H9. At the 0 same time cylinder llli which is connected to 7 port lzl wlll be connected to reocrvoir, permitting the spring M to disengage the clutch ell irorn the hand wheel it.

ll urther ticvvcrci iuoveut oi the pioneer i to lie lower or third citicu villi cue the annular groove I58 to interconnect the pressure port I03 with port I13 to which the channel 33 is connected, thereby causing fluid pressure to actuate piston 33 and cause engagement of the rapid traverse clutch.

When the machine is stopped, the control valve plunger I will always be in the position shown in Figures 7 and 13 and therefore it is necessary for the operator to rotate the lever I60 about the axis of pin ISI to start the machine. After the lever has been manually shifted into a feed or rapid traverse position, subsequent movements may be automatically eilected to complete an automatic cycle of operation.

For the purpose of shifting the plunger I54 from a deed position to a rapid traverse position, the plunger I54 is provided on the lower end with an enlarged spool I16 which slides in an enlarged portion I11 formed in the lower end of the sleeve, thus creating a piston differential between the opposing ends of spools I18 and I18. A pressure port I19 is, provided in the sleeve to communicate with the space between the spools I13 and I13 when the plunger is in a feed position. This port is connected by a channel I30 to port III of a rapid traverse pilot control valve I 82. The plunger I83 of this valve has an annular groove I84 which upon depression oi the valve will connect pressure port I85 to port IN to cause shifting of the control valve plunger I to a rapid traverse position.

Means are also provided for shifting the plunger I53 automatically from a rapid traverse position to feed position. and additional means are provided for shifting the plunger from either a rapid traverse position or a feed position to its stop position. A feed-stop trip plunger is provided for efiecting each of these movements. The actuating plunger for shifting the valve I from a rapid traverse position to a feed position is indicated by the reference numeral I86 in Figures 6, 7 and 13 of the drawings, and it will be noted that this plunger is slidable in a bore I31 formed in the base of the valve housing I 01 for engagement with the bottom of the plunger Ill.

The actuating plunger I 86 has an enlarged head I88 which is adapted to engage a shoulder I89 formed by the enlarged portion I" of the bore I81. This limits the upward movement of the plunger and by making the plunger of the proper length it will position the member I In the proper feed position, aided, of course, by the detent mechanism.

The enlarged portion I90 of the bore I81 constitutes a cylinder which is closed at the lower end by a plug I9I and connected by channel I32 to the port I 93 of a feed-stop trip valve I94. This valve has an interdrilled connection I95, Figure 9, which serves as a pressure port and which is connected by branch I 96 to port I35 of the rapid traverse trip valve I82.

A branch I91 of channel I03 is utilized to supply fluid to these two valves. The feed-stop valve has a plunger I98 in which is formed an annular groove I99 which is of such width that when the plunger is depressed a predetermined amount the pressure port I will be connected to port I33 to cause actuation of the plunger I36.

If the plunger is depressed agreater amount the port I85 is disconnected from port I93 and connected by means of an annular groove 203 in the plunger to a port ZOI whereby the fluid will flow through channel 302 to cylinder 233 for actuation of the stop plunger 2. The stop plunger is of the same construction as the feed plunger but of greater length so as to shift the control valve plunger I34 to its stop position.

Channels I32 and 202 are each provided with bleeder coils 203 and 203 whereby the fluid pressure in either of these channels may drain to reservoir after the trip plunger valve is closed.

The trip plunger valvw I82 and I84 are only effective during one direction of movement of the table and therefore a second set of valves is provided and arranged to be eflective during the other direction oi movement of the table. The other rapid traverse valve is indicated by the reference numeral 201, and has a port 208 connected by channel 28! to channel I, thus being connected in parallel, with port I3I of the rapid traverse valve I82, to the valve port I13. The feed-stop valve is indicated by the reference nu meral II! and has a first port III which is connected by channel II! to channel I32, thus being in parallel with port I93; and a second port 2I3 which is connected by channel 2 to channel 202, thus being in parallel with port I. The valve ZIII has an annular groove III which is connected by branch II! to port 2|! of the rapid traverse valve 201.

The annular groove 2I3 is connected to channel I02 through which fluid flows to the reversing cylinder 34. It will now be noted that the supply to the first set of trip plungers I83 and I58 is from the line I33 and to the other pair of trip plungers from line I02.

As previously described, channels I02 and I33 are alternately supplied with pressure to determine the direction of movement of the table and therefore during actuation of the table, only one of these channels is under pressure at a given time. This means that during one direction of travel oi the table only one set 01 plungers is supplied with pressure which means that the other set is rendered inoperative, and therefore if they are actuated by their respective trip dogs they will produce no eflect. This arrangement eliminates the necessity for using latch dogs when setting up a machining cycle.

One cycle of operation of the. machine will now be described, reference being had to Figures 3 and 4 which show a typical arrangement of dogs for producing the cycle diagrammatically shown in Figure 2, it being understood that many other cycles are possible, depending upon the arrangement of the trip dogs. It will be noted trom I'ligures 3 and 4 that the operating ends I" and I60 of the reverse control plungers lie in the same plane, both horizontally and vertically and therefore only one type of trip dog, such as ISI, is provided tor actuating these plungers. In the cycle shown, only one reversing dog is shown because in the cycle shown automatic reversal is only effected at one end of the table movement. The reverse control plungers are always supplied with pressure whenever the pumps are running and therefore are always eflective whenever they are depressed, thereby differing from the remaining plungers which are only efl'ective for a given direction of table movemen In the diagram of Figure 2 the point 2=Il repre. sents a. stop position at which time a stop dog such as 2" would be in a position to hold the feed stop plunger I38 depressed sufliclentiy to efiect connection of port I95 with port IIII. To start the machine the operator must actuate the lever I", but since pressure is behind the piston I it would be difllcult tomove the plunger I34 downward against this pressure. The operator, therefore, rotates the lever I" to cause rotation till ill

start the support at a iced rate. a rapid traverse control plunger, a trip dog carried by the'support for depressing said plunger to change the rate to rapid traverse, means for automatically reversing the direction or support movement, and power means connectible by said reversing means in one position thereof for rendering said plunger eiiective to produce a rate change under do: operation during one direction of support movement, and ineilective during the other direction of support movement.

5. In a milling machine having a translatable support, the combination with a transmission for translating said support, of a control mechanism for said transmission including a manually operable control for starting the support at a feed rate, a stop control'plunger potentially eflective for disconnecting the transmission from the support, a trip dos ior actuating said plunger, means for automatically reversing the direction or support movement, and means for connecting power to said plunger in response to demotion of sold reversing means whereby the stop plumper will be lnefiectlve under doe operation during advance movement oi the table, but will be efi'ective during return movement of the table.

d. In a milling machine having a transmission for a translatable support, the combination of a control mechanism for said transmission for varying the rate and direction thereof including a manually operable control positionable to start the support at a rapid traverse rate, a feed con trol element and a rapid traverse control element mounted adjacent said support, individual trip dogs tor said elements selectively positionable on said support, trip operable means eflective on said transmission lor reversing the direction of sup= port movement, and simultaneously rendering said elements eii'ective under dog operation our ins one direction of support travel and inefl'ective during the other direction of support travel.

'7. In a milling machine having a transmission for a translatable support, the combination of a control mechanism for said transmission for controlling the rate and direction of support translation including a manually operable control positionable to start the support at a rapid traverse rate, a teed control element and a stop control element mounted adjacent said supmrt, individual trip dogs selectively positionable on said support for efiecting successive actuation of said elements whereby the support after moving at a feed rate will stop, said stop control element also being ehectlve to shift said manually opereble control to c. stop position. said. manually operable control being movable in a second direction to preselect a new direction of support movement and simultaneously render said feed and stop control elements inefiectlve under dog actuation during movement of the support in the new direction.

e. In a milling machine having a transmission tor a translatable support. the combination ofa control mechanism for said transmission for controlling the rate and direction of support translation including a manually operable control positionable to start the support at a rapid traverse rate, a feed control element and a rapid traverse control element mounted adjacent said support, individual trip dogs for actuating said elements in the order named, whereby the sup port will travel successively at a rapid traverse rate, a feed rate and e. rapid traverse rate, a stop control element also positioned adjacent said support, a trip dog for actuating said last-named element to stop the support and simultaneously position said manual control in a stop position, said manual control being movable in a second plane to preselect a new direction of support movement and simultaneously render all of said control elements ineflective under dog actuation during the new direction of support movement.

9. In a milling machine having a transmission for a translatable support. the combination of a control mechanism for said transmission for controlling the rate and direction of support transla-- tion including a manually operable control p0sitionable to start the support at a rapid traverse rate, a feed control element and a trip dog therelor mounted respectively on a fixed part of the machine and on the support whereby to change said rapid traverse rate to a feed rate, means for automatically reversing the direction of support movement and rendering said iced control element ineflcctive during the return movement of sold support, 9. rapid traverse control element mounted adjacent said support, a trip dog for actuating cmd last=nemecl control element suhse= client to actuation oi said iced control element, and controlled by said reversing means for rendering" sold rapid traverse control element efiective under dog operation during one direction oi support movement only.

ill. In e. milling l. e having a transmission for a translatable support, the combination of a control mechanic-m for said tranmission-ior controlling the and direction oi support translation includine e. manually cperoble control poineflective during the reverse movement, a duplicate rapid traverse control element and control dog therefor, means operable by said reversing means for rendering said duplicate rapid traverse all control element eflective during the return,

movement of the table whereby it the table reverses while in a feed rate it will return at a rapid traverse rate.

ii. in e milling' machine having a transmission for a translatable support including a shizlteble reversing clutch for changing the direction of support movement, the combination of control mews for said clutch including fluid operable shifting means, e control valve, actuating pistons for said control valve, 21 source oi pressure, indivicluul pioneers for connecting the source of pressure to the respective pistons, said plungers normally being held in an inoperative position, channels connecting the plungers to their respective pistons, and bleeder coils connected to each chan nel whereby alter actuation of a plunger to a fluid connecting position and release to eii'ect actuation of a piston, the fluid in said channel may bleed to reservoir preparatory to the next movement.

l2. In e. milling machine having a transmission for a translatable support including an output shaft, a ahlftable reversing clutch for connecting said shaft to the transmission for efi'ecting' opposlte movement of the support, of fluid actuatlog and control means for said clutch including aaanoau o pair of channels, a control valve, a source oi nresonre connected to said valve, said valve havion an exhaust port, a first part movable for reveroely connecting said channels to said source t oi pressure and to said exhaust port to eflect opnosite shifting of the reversing clutch, a second volt/e part movable independently of taidv first port to connect said exhaust port to a source ot nreseure whereby both channels will be under to preosnre, means responsive to pressure in both of thin ehannels for shifting said reversing clutch to o. neutral position, a hand wheel :lor manual notnotlon oi the output shaft, and means ennuitnnoonolv responsive when pressure is connected tooth ehannels to eflect operative engagement tn hontt Wheel with said shaft.

"lino tnaehlne having a transmission ,hte nnoport including a shittahle ell itch tor connecting the transmission 'nooite tnovernent oi the onnoort, ht itolri ntoitito t o. note oi ohnnneie, t. eontroii roive, o oi oonneetcti nnirl toivo, oohi it eonnecttn t oohi chonnett to onto nretoor' no to oniri eithonot hort to hi onnosite ohtttintt ot the retention? tlnteh, nnti tnnger in soioi voive ntovnhlo independently oi nort to'eonneet ooin enhanst nort to o oouroe .oonro Wherehr hoth ohenneletviil ho under ohttil'ti'l, tnenne ronnsive to tree in th out onto ohonnels tor ohittine said reverolno: clutch to o nonttoi oooition, and manual and nine otter ohio tnoono tor ohiftinn raid plunger to eheet nentr lttotion oi. ooirl clutch erohte ntenno i'or el'littine oaiei r ntrot other: to o rooitt troveroo position, it eonnectino ootn ioot nornen nieene to coin hntton valve,

oonrce ot reoenre, nieono terrioot hr the tun nort tor notoottnn oald noon hntton rolve to connoet onto. ooinoe oi. nroonne to ooiti chcoi. to ot toiti oontrol valve to n roni'rt trotcroe nonltton, ontli nleanr connect on to thotntoi tor enhoontino the iioirl otter the tooth hntton vnlve einoeo.

it, in o. noiliino rnnchine having"; it trnnointnoton tor trnnolotohie onnoort inclndintt a nhlttnhle tit o'l'lnnntnn clutch, the combination oi control niennn tor ooiti clutch including means liiOliltiflll? rnolntnininn the clutch in a feed position, iio'lci onerohie cone ior ohiifting the clutch to a tenth trnveroo nooltion, a eource of pressure, to control vnlve hnvine" a feed position for connecting said onerohle intone to renervoir, and a rapid trnveroo nooitlon tor connectinz said fluid onerohie nieono to the oo'oree oi preosure, and other tinhi opernhie rnenno tor shifting the valve fttlhli til etther oi? oniol nooitionn to the other.

it. in o nailiino nnoehino having n tronninionion tor tronointnhte nnnnort, tnhi tronoiniooion in eintttno o teeri rontn troteine cintoh, the tltlttt hinntton oi? control intone i'or onirl olntch incintl ttt itniri otternhle tnetno tor ohitthnt the cinteh tiit to its rapid traverse position, resiliently operable means for shifting the clutch to a feed position,

a source of pressure, a control valve alternately positionable to connect said fluid operable means to reservoir or pressure, other fluid operable 5' means for shifting said control valve from'either or its positions to theother, trip operable valves for connecting pressure to said other fluid operable means, and trip dogs carried by the support for independent actuation of said tripoperable valves.

17. In a milling machine having a transmission tor o translatable support, eaid transmission including a teed-rapid traverse clutch, the comhination of control means for solo clutch inclnd- 7m inn tiuid operable means tor shitting the clutch to o, raniel troverse pooition, rneone oontinnonolr cii'ective tor shittint' the elntch to o. teen noeition when lttltiihhtlll'tl lo releooecl horn onto one otter ohle meant. to tonreo ot nretenro, n oontroivolvo hovinn n roniti troveroe nooltion in ivhioh told oonroo oi? nrotoino lo eonnoetort to ooirl tlnitt oporohie noenno, that o horn nooition in which ooirl ittttitt onotnhto theoeonneetott to rotten/"oh, onion hovin nooition, tnonnnilr on erohlo ntonnotor the volvo irotn tlnrtt nooition either oi ooht other, notheti nooitiono, onti itoht onerohlo nieonn ontonioticoiiy oontroliett hr the onnnort tor tinitino ooioi oontrol vtivo how he teen nooition to he rnploi trovcroo noei tion or tto ronhi troveree noeition to ito tenetnoottion to thnnno the rate oi niovetnent oi the ttinnom.

tt. to. n nonei'iino tntvino o tronenilorion tor o trorniotnhlo onnnort incl ,1 v trnroroe cintoh, the oonohinntton oi control ineona' lit for ooiol clnteh hieitntlnn o onernhie volvo hortno o. hrot position tor oonoino onirl cintch to he ohiited to o i'eet'i oeition, one o oecond pooi-' tion tor eoooine toiol clntch to he ohii'terl'to n ropid troveree position, a iirnt channel terminat ion in flnld operable means tor ehilftino ton eontroll valve to n teed position, o oeeonti channel terminating in thud operahle means for shitting said control vnlve to n tepid traverse nositlon, t5 control elemento rhvlainnl to said channels and trip'onerohle no the fiuphort tor connectinghuld nineeore to oalrl i nnals, nnol nieono in each of onto tor exhnnotine hohi therefrom otter rain trio onerotie eloniento hero elosetl. it. to o n'iiliino niece horinoo tronolotahle tntnnort, the conihinntion th to tronomlsoton tor rncinrocotinn onhl onnnort nt roriohlo rotor, thnoiicote oi oontroi elernento onerotivet v con noeton tor nrotlnonto roto ehonnonntntnhlo trio m noon otionterl to he oeioctivelr nooltionerl on onnnort in t'lenhnoi cvclie oeonenoe tor ehectinn onto nttnntion oi the reonectivo oontrot eleinento, trio onornhlo reverninn nienno, onri oeloetor rentierinn oohl oeto oi eontroi elements inehootivo ilihihi' not operation timing the reootlve throw tiono oi onnnort nioventent. v to. In a willing: nooce boring at translatable ennnort nnri n tronorntosion ior shittinn said too nort ot iiiherent retro, the conthhiotion oi dnnlitote neto oi control elentento operatlvelr con neeted tor nrorlncino told oliherent rates, trin tlono nolopteti to he nrrnnned on ooicl nnnnort in the oath ot the reeneetive eiemento not one net, ntlciitionni trio noon otinnteri to he nrronoeii on ooiti onnoort tn the tooth oi the eleniento oi the other one o oeleotor tor eotntcctinn onor to one oil" oontrol. eleinento nt tit. to o rniilintt tnncinno hntinn tittohlo Wt tit w t a teerhrtri w support, a transmission therefor including o shirtabie feed-rapid traverse selector ouu o emit able reverser, the combination of control means including four trip operable plunger-s having op erating portions lying in recpectively diflerent horizontal planes, trip dogs carried by the slide and operating in each of sold clones, to rapid truverse efiectino; piston and a. feed (fleeting piston means connecting two oi celri plunecrs in parallel to one of cold pistons, meme connecting remainline two oi? cold nlungcrs in perellel to the other of cold pietome, means responsive to the itrection of tonic movement for connecting o crotineoreecure to one of each of seioi percllel com nectecl pioneers whereby o ieecl control plunger end it room treveroe control plunger are eiieotivc under dog operation for one direction of table movement and the remaining oluneero ere eiiective during the other direction oi-tullle move ment.

22. in e milling muchlne having so translatable support one o tression mechonism therefor including; rate and direction selectors. euici direction selector having o pclr of elrectlon determining oositions one at stop coa ition cue celcl rate selector having e iceol curl its rapid traverse position, the combination of iiultl operable means for shifting the direction selector to its rectiou determining positions, auditioned fluid onereole means for shifting the direction; eclcctor to im stop position, fluid operable means for shifting the rate selector to its rapid treverce poeltion, control valve means having or plurality oi ouch tions for selectively connecting fluid to the sev eral fluid operable means, pilot circuits i'or'remote control positioning oi s valve meeucin eluding a pair of pistons for determining clireo= tion. a piston for producing as local rote, e piston for producing a. rapid travercerete one o oiesou for shiiting said control valve moons to at stop position, pairs of pcrcllel counecteo trio o3uerable pioneers for controlling ouch of the lest three-named oistone, o pair of trip omreolc plungers individually connected to the first pair of pistons, endxneuns controllerl o? the lectnameci pioneers for deteining which oi each pair of cold parallel connected pioneers eliell connector} to pressure.

23. in 2, milling machine having at trenslotulole support end e treseion for -octvetting err-lei support including rote one direction determinetore, the combination of o flute control circuit for sold oletorminetors including o control valve. a pilot circuit including fluid ehlitolole ports for positioning said control valve, on inuivitiuel comti'ol plunger channel-connected to each shiitable port, means connecting at source of pressure to said plungers whereby (iepresslon of a given plunger will produce a shifting pressure in said channel, and means ellective efter the plunger is released to exheust fluid from the channel to oer-colt return movement oi the fluid shlftable our-t.

'24. In 2! machine tool having relatively moveble tool one work supgrorts, the combination of a transmission mechanism for efiectlng said relative movement including a final output shaft, fiuiol operable control moons for changing the rote oi cold shaft, o remotely located control velve, u trip bracket locetcti adjacent the moving support, a, peir oi volve pioneers mounted in said hrochet, cloutmol meonc connecting said plungers ior uctuetion or? sole control valve. end trip clogs carried by the moving support for depressing ceicl plungers iior remotely controlling the posltion of cold control volve.

25. in e milling mecliine having a transmission including rote and direction selectors, the com birietiou oi control moons therefor including a plurality of i'iuicl operable means for shifting the severe! select-lore into various positions, u remote control valve for solol fiuit'i operable means incluoling 2. first part for controlling the admission of iiuiri pressure to the fiuiol ooerobie means for the olirectlou selector, one a second port for controlling the sion of fluid pressure to the fiuiol operable moons of the rote selector, said lootnointed port also being ofiective to effect shitting of the direction selector to a stop position reesc oi the position of the first-named cert.

:36. in o milling machine having a transmiseion including rate and direction selectors, the combination of control means therefor including o olurolitv of fluid oi'icleble means for shifting the eevcrel selectors into various positions, a remote control volve ior said fiuicl operable means inclucliug c first purl: for controlling the edmiselon or fluid pressure to the fluid operable means ior the direction eelootor, one 9, second port for controlling the eoimiceicn oi fluid m-essure to the fluid operable means oi the rote selector, said loot-numera port also being effective to effect shifting of the direction selector to a, stop position rogurcilcoc oi the position of the first-nomad part, one iiuirl operable control means including trip operable elements for remotely controlling the position oi the ports of said control valve.

Elli G. ROEHM. HANS FRITSCi-ii. 

